So I ask myself when and if there will be 4th season on Netflix. If anyone knows, please write me.
Season 3. What Netflix calls Season 2 (signs of a Holy War) are special episodes.
The new season is still running in Japan and is expected to end in late March. After that I would expect a waiting period of several months. Officially, Netflix has not said when they will make the season available outside of Japan. The last season was 3.5 months.